Aim To study the establishment of product model for rapid variant design. Methods A kind of product model frame

based on the model of analysis and calculation

centered on the model of object characteristic table

including the model on principle

the assembling model and the part model

is put forward. Results With the design knowledge and constraint included the rapid variant design of products can be achieved. Conclusion The frame and way have been realized on the platform of ObjectD and are put into practice of variant designing. Good effects have been achieved.